25522564144 has 160 divisors (see below), whose sum is σ = 63424512000. Its totient is φ = 9862594560.

The previous prime is 25522564141. The next prime is 25522564153. The reversal of 25522564144 is 44146522552.

It is a junction number, because it is equal to n+sod(n) for n = 25522564097 and 25522564106.

It is not an unprimeable number, because it can be changed into a prime (25522564141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7665072 + ... + 7668400.

It is an arithmetic number, because the mean of its divisors is an integer number (396403200).

Almost surely, 2^25522564144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25522564144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31712256000).

25522564144 is an abundant number, since it is smaller than the sum of its proper divisors (37901947856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25522564144 is a wasteful number, since it uses less digits than its factorization.

25522564144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496 (or 3476 counting only the distinct ones).

The product of its digits is 384000, while the sum is 40.

The spelling of 25522564144 in words is "twenty-five billion, five hundred twenty-two million, five hundred sixty-four thousand, one hundred forty-four".